Trolley.



N0. 801,335. PATENTED 00T. 10, 1905.

E. J. PARKER.

TROLLEY. J APPLIUATION FILED 1120.23. 1904.

WTN ESS E5.

NVENTOR.

AT1-o R N EY. E

UNITED V STATES EafrEE'r ernten.

TROLLEY.

Specification of Letters Patent.

Patented Oct. 10, 1905. i

Application filed December 23, 1904. Serial No. 238,105.

To all whom, it may concern:

Be it known that I, EUGENE J. PARKER, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Trolleys, of which the following is a specification, reference being had therein to the accompanying drawings.

My inventionrelates to the heads or harps of trolleys, and has for its primary purposes a means for protecting the forks or bearings a of the trolley from accidental contact with the guy or other wires which run transversely to the feed-wire and. have heretofore occasioned loss and extensive damage to equipment.

An additional object is to provide means for accommodating the trolley-wheel to the change of direction of the car turning a curve, but to provide means for inducing the wheel to return to retain its original plane when the latter is disengaged from the trolley-wire for shifting.

A further purpose is to provide a trolleywheel of a structure to reduce the tension upon the trolley-wire, and, finally, to provide means of facilitating an exchange of trolleywheels.

To the above ends my invention consists of the novel structure and combination of parts hereinafter described, and illustrated in the accompanying drawings, wherein- Figure 1 is a side elevation of my trolley; Eig. 2, a plan of the same; Fig. 3, a central vertical section of a portion of the same, showing parts broken away; Eig. 4, a section on line fc m of Eig. 2, showing the parts in normal position;Eig. 5, a like section of the same, showing the parts under tension; and Fig. 6 a transverse section of the margin of the trolley-wheel.

Like reference-numerals indicate like parts throughout the views.

A convenient embodiment of my invention comprises a trolley-arm 1, upon which is mounted a iiat head or base 2, connected to the pole by an upwardly-directed arm or knee 3. Pivoted to the base by a pivot-pin 4 is a disk 5, provided with vertical supports 6, having vertical slots 7 extending from their upper extremities to form bearings for the pintle 8. The disk and supports thus form a yoke. The outer faces of the supports are provided with circular depressions andvshoulders 9 to receive and retain lock-nuts 10, mounted upon the threaded ends of the pintle 8.

The pivot-pin 4 is provided with a head 4 and threaded extremity 42, upon which is a nut 43, permitting vertical adjustment of the disk or yoke 5. Annular grooves 11 in the opposite inner faces of the yoke and base furnish a seat for antifriction-balls 12. Semicircular segmental grooves 13, diametrically opposite each other and preferably directly beneath the trolley-wheel 14, are provided in the upper face of the base 2, while similar grooves 14 in the lower face of the yoke 5 register with the grooves 13. In the two circular openings formed by the grooves above described are the spiral springs 15 and 15.

The wheel 14 is loosely mounted upon the spindle 8. In detail the groove 17 of the wheel is of enlarged transverse diameter intermediate its depth, forming ianges 18, with internal marginal beads or ribs 19, which have a tendency 4to retain the trolley-wire against accidental escape from its seat in the groove 17.

In operation when the pole or knee 3 comes in contact with a guy-wire the latter will be directed over the wheel 14, and the trolley parts will proceed without accidental engagement or entanglement of parts. By virtue of the springs 15 and 15 the wheel 14 will be normally retained in longitudinal relation to the base 2 and pole 1 and in the plane of the feed-wire, the parts adjacent the springs appearing as shown in Fig. 4. When, however, any torsional strain for any reason is brought to bear upon the wheel 14, the springs 15 and 15 are contracted, and the parts appear as indicated in Eig. 5.

The vertical slots 7 in the supports 6 provide a means for readily removing' the pin or pintle 8 and substituting thereon a new wheel, while the nuts 10, seated in the depressions 9, lock the pintle 8 into its bearings.

If desired, the arm 3 may be integral with the pole 1 without departing from the spirit of my invention.

Having described my invention, what I claim is- 1. In a trolley device, the combination with the head, of a yoke pivotally mounted upon the head with antifriction-bearings between the yoke and head, a wheel mounted in the yoke and means disposed between the pivot IOO IOS

and the antiriction-bearings and disposed between the yoke and head for normally retaining the yoke in the plane of the feed-wire.

2. In a trolley device, the combination with the head, of a yoke pivotally mounted upon the head antifriction-bearings between the head and yoke, a wheel mounted in the yoke, and springs disposed between the pivot and said antifriction-bearings and intermediate the head and yoke.

3. In a trolley device, the combination with the head, of a yoke upon the head, a pivotpin engaging the head and yoke, means upon the pin for adjusting the head and yoke, and ball-bearings intermediate the head and yoke and springs disposed in recesses in the adjacent faces of the head and yoke and disposed between the ball-bearings and the pivot of the head.

4. In a trolley-wheel, the combination with a head having an upwardly directed arm, and a disk having vertical supports with vertical slots, the adjacent faces of the head and disk being provided with semicircular Segmental grooves diametrically opposite each other, springs in said grooves, a spindle engaged in the slots of said supports, said supports having circular depressions and shoulders and lock-nuts on the ends of the spindle received in said depressions all substantially and for the purpose specified.

In testimony whereof I have affixed my signature in presence of two witnesses.

EUGENE J. PARKER.

Witnesses:

HoRA'rIo E. BELLows, WILLIAu E. BROWN. 

